Tri-Cities in late April - what to chase?

Hi everyone.  My wife has a few days of Continuing Medical Edjamacation in Pasco next week, and I was given a kitchen pass to drag the kayak along to occupy my days.  Is there anything in particular that would be fun and productive to chase?  It would all be catch and release, assuming there’s any ‘catch’ taking place.

Thinking about exploring the islands around the mouth of the Yakima River - would I be in an environment for bass, walleye, panfish, etc? 

Any advice and/or local info appreciated, or if anyone else wants to go out.

Jim

I know they catch nice bass around those islands and up in the Yakima. If you take a little drive to the Columbia you will find really good small mouth fishing. Jim Davis Jimbob84? is out there and Magic Mike smokeyangler is out there too.
jed